631761201 has 40 divisors (see below), whose sum is σ = 992514600. Its totient is φ = 399893760.

The previous prime is 631761197. The next prime is 631761211. The reversal of 631761201 is 102167136.

631761201 is a `hidden beast` number, since 631 + 7 + 6 + 1 + 20 + 1 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 14288400 + 617472801 = 3780^2 + 24849^2 .

It is not a de Polignac number, because 631761201 - 2² = 631761197 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (631761211) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 141085 + ... + 145493.

It is an arithmetic number, because the mean of its divisors is an integer number (24812865).

Almost surely, 2^631761201 is an apocalyptic number.

631761201 is a gapful number since it is divisible by the number (61) formed by its first and last digit.

It is an amenable number.

631761201 is a deficient number, since it is larger than the sum of its proper divisors (360753399).

631761201 is a wasteful number, since it uses less digits than its factorization.

631761201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4511 (or 4502 counting only the distinct ones).

The product of its (nonzero) digits is 1512, while the sum is 27.

The square root of 631761201 is about 25134.8602741292. The cubic root of 631761201 is about 858.0599865146.

The spelling of 631761201 in words is "six hundred thirty-one million, seven hundred sixty-one thousand, two hundred one".